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If {:A=[(costheta,-sintheta),(sintheta,c...

If `{:A=[(costheta,-sintheta),(sintheta,costheta)]:},"then" A^T+A=I_2`, if

A

`theta=npi,ninZ`

B

`theta=(2n+1)pi/2,ninZ`

C

`theta=2npi+pi/3,ninZ`

D

None of these

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The correct Answer is:
C
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